Skill-up's

[Jynx]

but you can increase it, and have some sort of control...that you can't have over skilling-up.

Again with the misinformation. You had control over your chances to skillup by finding monsters of the apropriate level for that skill.

If you fought monsters of a high level you would get large but often sporadic chunks of skill, if you fought too low you got nothing. If you fought with a level that was just right, much like goldylocks you would get apreciable skillups. It seems knowing how to properly skillup was a skill in itself as few people seem to know how it actually worked and just did Kuftal burns with their rank 5 sword skill.